Synthesis, Characterization and Photophysical Studies of D‐π‐A Based Conjugated Triphenylamine Derivatives. Issue 11 (22nd July 2016)

• Record Type: Journal Article
• Authors: Balasaravanan, Rajendiran; Sadhasivam, Velu; Siva, Ayyanar; Pandi, Mohan; Thanasekaran, Ganesan; Arulvasu, Chinnasamy
• Is Part Of: ChemistrySelect. Volume 1:Issue 11(2016)
• Page Start: 2792
• Page End: 2801
• Publication Date: 2016-07-22
• Subjects: Donor-π-acceptor molecule -- intramolecular charge transfer -- solvatochromism -- triphenylamine -- DFT study; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201600608
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: We synthesized a new series of intramolecular charge transfer (ICT) molecules by attaching very strong electron‐withdrawing groups to a triphenylamine backbone. ICT interactions can be found for all the triphenylamine (TPA) derivatives due to the electron withdrawing properties of the cyanide on the end terminal triphenylamine moiety. When introducing the electron withdrawing group on the TPA moiety giving rise to efficient emission tuning from blue to green in polar solvents, due to the increase in ICT interactions which results in the bathochromically shifted ICT band observed. Further, from these results, we found that all the compounds exhibit intensive ICT interactions leading to substantial extension of their absorption spectral response. Abstract : Herein we report the synthesis of new series of multi branched triphenylamine derivatives and their photophysical behaviours. When introducing the acceptor cyano group at the end of peripheral, the intramolecular charge transfer character was increased. Further, the theoretical calculations (DFT method), we found that the HOMO and LUMO are separated and electron density are localized on the TPA core (Donor) and peripheral moieties (Acceptor) respectively.